Water heater



FIG. 1 is a right side elevational view of a water heater showing my new design, the left side being a mirror image of the right side shown;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a top plan view thereof.

The broken line representation of a shower head in FIGS. 1, 2, 3 and 5 and the fragmentary broken line representation of an electrical cable in FIGS. 1, 2, 4 and 5 are for purposes of illustration only and form no part of the claimed design. 

The ornamental design for a water heater, as shown. 